Tag is not compatible with custom data layer name

[joedarsh]

Google Tag Manager allows you to set a custom data layer name to avoid conflicts with other Google tags, however in this template the default data layer name is hard coded (line 351):

const dataLayerPush = require('createQueue')('dataLayer');

This results in consent initialisation being pushed to the wrong tag if using a custom name.

I've come up against this and modified the template in our GTM property to use our custom data layer name, however it would be great if data layer name could be a configurable option in this template.